"Amundsen's Expedition to the South Pole" is an article from Bulletin of the American Geographical Society, Volume 44. View more articles from Bulletin of the American Geographical Society.View this article on JSTOR.View this article's JSTOR metadata.You may also retrieve all of this items metadata in JSON at the following URL: https://archive.org/metadata/jstor-199591 Source: http://www.jstor.org/stable/10.2307/199591
Based on the HVZ theorem and dilation analyticity of the pseudorelativistic no-pair Jansen-Hess operator, it is shown that for subcritical potential strength (Z < 90) the singular continuous spectrum is absent. The bound is slightly higher (Z < 102) for the Brown-Ravenhall operator whose eigenvalues are, by the virial theorem, confined to Source: http://arxiv.org/abs/math-ph/0611037v1
We consider the pseudorelativistic no-pair Brown-Ravenhall operator for the description of relativistic one-electron ions in a homogeneous magnetic field B. It is shown for central charge not exceeding Z=87 that their ground state energy decreases according to the square root of B as B tends to infinity, in contrast to the nonrelativistic behaviour. Source: http://arxiv.org/abs/0903.3531v1
Based on the Mehler heat kernel of the Schroedinger operator for a free electron in a constant magnetic field an estimate for the kernel of E_A is derived, where E_A represents the kinetic energy of a Dirac electron within the pseudorelativistic no-pair Brown-Ravenhall model. This estimate is used to provide the bottom of the essential spectrum for the two-particle Brown-Ravenhall operator, describing the motion of the electrons in a central Coulomb field and a constant magnetic field, if the... Source: http://arxiv.org/abs/0709.1034v2
Book from Project Gutenberg: De Noordwestelijke Doorvaart De Aarde en haar Volken, 1909 Library of Congress Classification: G Topics: Amundsen, Roald, 1872-1928 -- Travel -- Northwest Passage, Gjøa (Ship), Northwest Passage --... Source: http://www.gutenberg.org/ebooks/21878
Book from Project Gutenberg: The South Pole; an account of the Norwegian Antarctic expedition in the "Fram," 1910-12 - Volume 1 and Volume 2 Library of Congress Classification: G Note: Translation of Sydpolen.
This article is from BMC Public Health, volume 12.AbstractBackground: Alcohol drinking is a risk factor for harm and disease. A low level of drinking among non-Western immigrants may lead to less alcohol-related harm and disease. The first aim of this study was to describe frequency of drinking in two generations of immigrants in Oslo, contrasting the result to drinking frequency among ethnic Norwegians. The second aim was to study how frequency of drinking among adult immigrants was associated... Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3438095
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There are numerous challenges associated with placing a spacecraft in orbit around Mars. Often. trades must be made such as the mass of the payload and the amount of fuel that can be carried. One technique employed to more efficiently place a spacecraft in orbit while maximizing payload mass (minimizing fuel use) is aerobraking. The Mars Odyssey Spacecraft made use of aerobraking to gradually reduce its orbit period from a highly elliptical insertion orbit to its final science orbit.... Topics: TEMPERATURE DISTRIBUTION, TURBINE BLADES, LIQUID COOLING, TRAILING EDGES, DESIGN ANALYSIS, HEAT...
The proposed Hydrostar mission used a large orbiting antenna array to demonstrate synthetic aperture technology in space while obtaining global soil moisture data. In order to produce accurate data, the array was required to remain as close as possible to its perfectly aligned placement while undergoing the mechanical and thermal stresses induced by orbital changes. Thermal and structural analyses for a design concept of this antenna array were performed. The thermal analysis included orbital... Topics: SPACE COMMUNICATION, RADIO COMMUNICATION, DEEP SPACE NETWORK, AEROSPACE ENGINEERING, DATA...
This article is from Ecology and Evolution, volume 3.AbstractAs an effect of anthropogenic CO2 emissions, the chemistry of the world's oceans is changing. Understanding how this will affect marine organisms and ecosystems are critical in predicting the impacts of this ongoing ocean acidification. Work on coral reef fishes has revealed dramatic effects of elevated oceanic CO2 on sensory responses and behavior. Such effects may be widespread but have almost exclusively been tested on tropical... Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3810864
byPraebel, Kim; Gjelland, Karl ?ystein; Salonen, Erno; Amundsen, Per-Arne
This article is from Ecology and Evolution, volume 3.AbstractSpecies invasions can have wide-ranging biological and socio-economic effects and are generally unwanted by legislation. Identification of the source population as well as the ecology and genetics of both the invader population and the receiving community is of crucial importance. The rapid invasion of a small coregonid fish vendace (Coregonus albula) in a major northern European subarctic watercourse has resulted in a labile... Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3678492
byMobley, Kenyon B; Amundsen, Trond; Forsgren, Elisabet; Svensson, Per A; Jones, Adam G
This article is from BMC Evolutionary Biology, volume 9.AbstractBackground: A major question in behavioural ecology concerns the relationship between genetic mating systems and the strength of sexual selection. In this study, we investigated the genetic mating system of the two-spotted goby (Gobiusculus flavescens), a useful fish model for the study of sexual selection whose genetic mating system remains uncharacterized. We developed four polymorphic microsatellite markers and used them to... Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2631507
This article is from Ecology and Evolution, volume 3.AbstractParallel phenotypic evolution occurs when independent populations evolve similar traits in response to similar selective regimes. However, populations inhabiting similar environments also frequently show some phenotypic differences that result from non-parallel evolution. In this study, we quantified the relative importance of parallel evolution to similar foraging regimes and non-parallel lake-specific effects on morphological... Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3686194
This article is from BMC Genomics, volume 14.AbstractBackground: Buffalograss [Buchloë dactyloides (Nutt.) Engel. syn. Bouteloua dactyloides (Nutt.) Columbus] is a United States native turfgrass species that requires less irrigation, fungicides and pesticides compared to more commonly used turfgrass species. In areas where water is limited, interest in this grass species for lawns is increasing. While several buffalograss cultivars have been developed through buffalograss breeding, the... Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3846939
byJørgen Trømborg; Julien Scheibert; David Skålid Amundsen; Kjetil Thøgersen; Anders Malthe-Sørenssen
We describe a 2D spring-block model for the transition from static to kinetic friction at an elastic slider/rigid substrate interface obeying a minimalistic friction law (Amontons-Coulomb). By using realistic boundary conditions, a number of previously unexplained experimental results on precursory micro-slip fronts are successfully reproduced. From the analysis of the interfacial stresses, we derive a prediction for the evolution of the precursor length as a function of the applied loads, as... Source: http://arxiv.org/abs/1105.3325v2
This article is from Current Cardiology Reviews, volume 9.AbstractLate gadolinium enhancement is a useful tool for scar detection, based on differences in the volume of distribution of gadolinium, an extracellular agent. The presence of fibrosis in the myocardium amenable to be detected with late gadolinium enhancement MRI is found not only in ischemic cardiomyopathy, in which it offers information regarding viability and prognosis, but also in a wide variety of non-ischemic cardiomyopathies.... Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3780343
We study the dynamic behaviour of 1D spring-block models of friction when the external loading is applied from a side, and not on all blocks like in the classical Burridge-Knopoff-like models. Such a change in the loading yields specific difficulties, both from numerical and physical viewpoints. To address some of these difficulties and clarify the precise role of a series of model parameters, we start with the minimalistic model by Maegawa et al. (Tribol. Lett. 38, 313, 2010) which was... Source: http://arxiv.org/abs/1111.2489v1
This article is from PLoS ONE, volume 9.AbstractIn order to attribute the behaviour of an animal to its personality it is important to study whether certain behavioural traits show up consistently across a variety of contexts. The aim of this study was to investigate whether breeding state males of the two-spotted goby, Gobiusculus flavescens, showed consistent degree of boldness when tested in four different behaviour assays. We also wanted to investigate whether boldness varied over the... Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3966876